کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1637583 | 1516972 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Casting effect on compressive brittleness of bulk metallic glass
ترجمه فارسی عنوان
اثر ریخته گری بر تراکم فشاری شیشه های فله بزرگ
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کلمات کلیدی
عینک های بزرگ فلزی، رفتار مکانیکی، تغییر شکل پلاستیک باند برشی، حجم آزاد،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
چکیده انگلیسی
An interesting phenomenon of cooling-rate induced brittleness in Zr52.5Cu17.9Ni14.6Al10Ti5 bulk metallic glass (BMG) was reported. It was found that the as-cast BMG specimens exhibited a brittle-ductile transition when the larger specimens were machined into smaller specimens through removing the cast-softening surface layer by layer. After compression tests, the as-machined small specimens, owing to the absence of the cast-softening surface, displayed highly dense and intersecting shear bands, and extensive plastic deformation. This is in contrast to the catastrophic failure and low deformability in the as-cast large specimens. More free volume was detected in the smaller as-fractured specimens, by differential scanning calorimetry, which may be attributed to the occurrence of strain softening and increased plasticity. Compared with the relatively smooth fracture surface in the smaller specimens, the larger specimens showed more diverse features on the fracture surface due to their graded structures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 24, Issue 2, February 2014, Pages 385-392
Journal: Transactions of Nonferrous Metals Society of China - Volume 24, Issue 2, February 2014, Pages 385-392
نویسندگان
Hong WU, Yong LIU, Kai-yang LI, Zhong-wei ZHAO,